MEASUREITEMSTRUCT
   Windows Structure to measure an owner-drawn control
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   The MEASUREITEMSTRUCT structure informs Windows of the dimensions of an 
   owner-drawn control. This allows Windows to process user interaction with
   the control correctly.
   The owner of an owner-drawn control receives a pointer to this structure
   as the lParam parameter of an WM_MEASUREITEM message. The owner-drawn
   control sends this message to its owner window when the control is
   created. He then fills in the appropriate members in the structure for
   the control and returns.
   This structure is common to all owner-drawn controls. 

 STRUCTURE:


    +--------------------------------------------------------------+
    |  /* MeasureItemStruct */                                     |
    |                                                              |
    |   typedef struct tagMEASUREITEMSTRUCT {   /* mi */           |
    |    UINT   CtlType;                                           |
    |    UINT   CtlID;                                             |
    |    UINT   itemID;                                            |
    |    UINT   itemWidth;                                         |
    |    UINT   itemHeight;                                        |
    |    DWORD  itemData;                                          |
    | } MEASUREITEMSTRUCT;                                         |
    +--------------------------------------------------------------+



 DESCRIPTION:

  CtlType    Specifies the control type. The values for control types are
             as follows: 

             ODT_BUTTON    Owner-drawn button 
             ODT_COMBOBOX  Owner-drawn combo box 
             ODT_LISTBOX   Owner-drawn list box 
             ODT_MENU      Owner-drawn menu 

  CtlID      Specifies the control identifier for a combo box, list box
             or button. This member is not used for a menu. 

  itemID     Specifies the menu-item identifier for a menu or the list-box
             item identifier for a variable-height combo box or list box.
             This member is not used for a fixed-height combo box or list
             box or for a button. 
  itemWidth  Specifies the width of a menu item. The owner of the owner
             drawn menu item must fill this member before returning from the
             message. 
  itemHeight Specifies the height of an individual item in a list box or
             a menu. Before returning from the message, the owner of the
             owner-drawn combo box, list box or menu item must fill out this
             member. The maximum height of a list box item is 255. 

  itemData   Contains the value that was passed to the combo box or list box
             in the lParam parameter of one of the following messages: 

              CB_ADDSTRING 
              CB_INSERTSTRING
              LB_ADDSTRING
              LB_INSERTSTRING